Stone mastic asphalt (SMA) mixtures (A2.2)

A2.2.1: SMA must conform to BS EN 13108-5 and PD 6691. Conformity must be established in accordance with BS EN 13108-20 and BS EN 13108-21. The following SMA mixtures are permitted by this Code, depending upon the detail requirements of the relevant section.
A2.2.2: Requirements for deformation resistance as assessed by wheel tracking performance (WTR) are in accordance with PD6691 appendix D, Table D.2 and the note to that table.